查询词典 symmetries

The main purpose of this dissertation is to study the problems of symmetries and conserved quantities of controllable nonholonomic systems and mechanico-electrical dynamical systems, based on the invariance of the Hamilton action under the infinitesimal Lie group transformation.

本文基于Hamilton作用量在无限小Lie群变换下的不变性，研究可控非完整系统与机电动力系统的对称性和守恒量问题。

Several non-isolated-pentagon structures of low symmetries are found to have low energies close to the most stable isomer.

并且一些较低对称性的非IPR异构体也拥有与最低能量接近的较低能量。

This volume is concerned with the relationship between symmetries of a linear second-order partial differential equation of mathematical physics, the coordinate systems in which the equation admits solutions via separation of variables, and the properties of the special functions that arise in this manner.

这卷涉及在一个数学物理学的线的第2 命令的偏微分方程的对称性之间的关系，坐标系统，方程式通过变量分离和如此出现的特殊函数的特性承认解决办法。

In this thesis, we mainly discuss the potential symmetries and linearization of the nonlinear evolution equations.

本论文主要研究非线性发展方程组及单方程的势对称以及它们的线性化。

By means of symmetries, we give a sufficient and necessary condition of general linearization.

利用对称性给出了非线性系统一般线性化的充要条件。

Like the mandala, knot designs are by definition rich in symmetries.

像曼荼罗一样，结设计是依照对称性方面丰富的解读。

It is concluded that the nonclassical symmetries of the nonlinear partial differential equations can be derived by using the compatibility between the original equation and the invariant surface condition.

由此，得到了利用不变条件及初始方程的相容性也可求得非线性偏微分方程的非古典对称的决定方程的重要结论。

Chapter 4 mainly deals with the mechanical calculation of determine equations associated with classical and nonclassical Lie symmetries for differential equation.

第四章考虑微分方程对称确定方程组的机械化计算。

As long as the system of first order polynomial DDEs in (1+1)-dimensions is given, no matter whether a single equation or the coupled equation, CLawDDEs can automatically output the scaling symmetries of the variables and a series of possible polynomial conservation laws for different rank.

只要输入多项式形式的等秩DDE，无论是单个方程还是耦合方程组，CLawDDEs都能自动确定变量的标度变换特性和不同秩的多项式守恒律。

The application of the method can also be extended for the textured materials with other sample symmetries in addition to orthorhombic symmetry.

所述方法可适用于任何晶体结构对称的织构材料及三维应力状态，并可推广至正交对称外的其他试样对称的织构材料。

Vishnu entered a dark fourth dimensional dream that did not support his field or continued life.

毗瑟挐进入了一个第四密度的黑暗梦想，那里并不支持他的能量场或继续生命。

Leaders and decision-making persons use it to collect the data, including the information of unit work, handing in fee, oweing fee, prepaying fee,changing and afterpaying and account transfering of joining-insurance employee, and account paying of all kinds of insurances from hospitalization insurance institutions.The collected data is picked up, organized, switched and showed to user.

该子系统主要面向各级领导、决策分析人员；从各个医疗保险经办机构和定点医疗机构采集数据，包括在各个医疗保险经办机构处理的单位办公信息，单位缴费、欠费、预缴费信息，参保职工变更信息，参保职工增减变动信息，参保职工补缴信息，参保职工帐户划拨信息：包括各定点医疗机构处理的各险种帐户支出信息，各险种的统筹金支付信息等；将采集的数据提取，组织和转换，然后展示给用户。